Hi @Lorenzo_Gulli – can you describe the basics of your setup, and the details of your network, as described here:
In particular, it would be good to know about your router, any other network hardware involved, how your Core machine connects to the internet, and whether there’s anything involved in your network like a web proxy, hardware firewall, campus internet, VPN, etc.
I’m sure we can get this working @Lorenzo_Gulli – thanks!